Recommendation system by: Public institution
Manual de Fertilização das Culturas / Manual of Crop Fertilization
The manual includes a range of information on soil fertility and the nutrition and fertilisation of the main agricultural crops. The aim of the manual is to help farmers on their holdings to ensure rational fertilisation of crops, in economic and environmental terms, while safeguarding natural resources.
Access the recommendation system
Wheat
Maize
Potatoes
Nitrogen
Phosphorus
Potassium
| Publisher | Public institution |
| Name | Manual de Fertilização das Culturas / Manual of Crop Fertilization |
| Weblink | https://www.iniav.pt/images/publicacoes/livros-manuais/Manual_Fertilizacao_das_culturas.pdf |
| Countries covered | Portugal |
| Regions covered | The recommendation system does not specify country regions |
| Language | Portugese |
| Crops covered | Wheat, Maize, Potatoes, Vegetables, Cover crops, Other cereals, Brassicas |
| Nutrients covered | Nitrogen (N), Phosphorus (P), Potassium (K), Sulphur (S), Calcium (Ca), Magnesium (Mg), Boron (B), Copper (Cu), Iron (Fe), Manganese (Mn), Sodium (Na), Zinc (Zn) |
| Target soil pH Recommendations based on soil and cropping types | Provided |
| Nitrogen | |
| Crops for Nitrogen Recommendation | None |
| Nitrogen Analysis Options | Organic matter |
| Soil Nitrogen Assess Method | Estimated |
| Factors for estimated Soil Mineral N | Soil type, Rainfall, Past management, Current crop status |
| Soil Nitrogen content measurement | None |
| Phosphorus | |
| Crops for Phosphorus Recommendation | Maize, Potatoes, Wheat |
| Soil Phosphorus content measurement | Lab based method |
| Phosphorus Sampling Frequency | Annually |
| Lab analysis method for Phosphorus | Modified Egner-Riehm method |
| Potassium | |
| Crops for Potassium Recommendation | Maize, Potatoes, Wheat |
| Soil Potassium content measurement | Lab based analysis |
| Lab analysis method for Potassium | Modified Egner-Riehm method |
| Potassium Sampling Frequency | Annually |
| Potassium Measurement Method | None |
| Soil available Potassium(Κ) from potash clays | Does not account for potash releasing clays |
| Guidance for minimizing nitrate leaching | Provided |
| Crops for which the recommended N rate is adapted depending upon nitrate leaching risk | Wheat, Maize, Potatoes |
| Nitrogen | |
| Dry Springs | Not Considered |
| Advice on irrigation for N recommendation | Not Provided |
| Spring Crop N content | Not Accounted for |
| Accepted methods for assessment of spring crop N content | |
| Phosphorus | |
| Spring Crop P content | Not Accounted for |
| Accepted methods for assessment of spring crop P content | |
| Nitrogen | |
| Current in season crop N requirement | Not Estimated |
| Basis for N Requirement Estimation | |
| Expected yields | Estimated in season N requirement can be adjusted for expected yields |
| Basis of crop N requirements | |
| Phosphorus | |
| Current in season crop P requirement | Estimated |
| Basis for P requirement estimation | Standard values for crop P content |
| Expected yields | Estimated P requirement can be adjusted for expected yields |
| Basis of crop P requirements | Crop approach, Rotation approach |
| Potassium | |
| Current in season crop K requirement | Estimated |
| Basis for K requirement estimation | Standard Yield |
| Expected yields | Estimated K requirement can be adjusted for expected yields |
| Crops for which yield adjustments are made | None |
| Adjustments for Potato Recommendations | |
| Recommendations on length of growing season, variety, haulm length and/or determinacy groups | Not available |
| Available adjustments for potatoes | Effect of irrigation |
| Adjustments for nitrate leaching, gaseous N-losses and Ammonia Mitigation | |
| N adjustments to account for gaseous N-losses are included for | Not included |
| Fertiliser types and additives change recommendation | |
| Ammonia mitigation strategies used for manufactured fertilisers | |
| Manure application methods used for reducing ammonia emissions | |
| Organic materials nutrient content | |
| Crop available N for different types of organic material | Calculated |
| Organic materials for which crop available N is calculated | Farmyard manure (cattle, goat, pig, sheep, horse, duck), Compost, Biosolids |
| Crop available nutrients from organic materials accounted for | Nitrogen (N), Phosphorus (P), Potassium (K) |
| Nutrients for which there is an option to input own organic material nutrient analysis | None |
| Types of organic materials for which regulation stipulates a sampling requirement | None |
| Guidance on fertilizer application timings | Provided, Adjusted for the total amount of nutrient applied |
| Guidance on the rate of fertiliser to apply at each timing | Provided |
| Number of fertilizer N applications in wheat | 3 |
| Application number between maize and potatoes | Different |
| Number of fertiliser N applications in maize (or potatoes) | Maize and Potatoes - two N application |
| P & K application frequency in winter wheat | Once a year |
| P & K application frequency between maize and potatoes | Does not differ |
| P & K application frequency in maize (or potatoes) | |
| Crops with guidance available for the placement of fertilisers | Wheat, Maize, Potatoes |
Funded by the European Union and UK Research and Innovation (UKRI). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union, European Commission or UKRI. Neither the European Union, European Commission nor UKRI can be held responsible for them.
Project Coordinators
Sarah Kendall
sarah.kendall@adas.co.ukSpyros Fountas
sfountas@aua.grheurope.nutrichecknet@gmail.com
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